Rotary-brush sweeper



0. R. STROME.

ROTARY BRUSH SWEEPER. APPLICATION FILED MAY 3, I9I9- RENEWED JAN. 8.192].

1,383,440. Patented July 5, 1921.

2 SHEETS-SHEET I.

WITNESSES:

0. R. STROME. ROTARY BRUSH SWEEPER. APPLICATION mm IIAY 3.1919. RENEWED m4. 8. I921,

Patented July 5,1921.

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c7 6. WITNESSES: W yfg 412.1. K.

UNITED STATES PATENT OFFICE.

ORRIN R. STROME, OF MELFORT, SASKATCHEWAN, CANADA.

ROTARY-BRUSH SWEEPER.

Application filed May 3, 1919, Serial No. 294,514. Renewed January The present invention relates 'to new and 7 useful improvements sweeping apparatuses, more particularly; of thattype including rotary brushes adapted to be propelled over the surface tobe cleaned. Y

It'is in general the object of the present invention to simplify and otherwise improve thez' structure and to increase the efficiency and readiness of operation of brushes of this character, and more particularly of that small type adapted for household use.

with respect to their direction'of movement,

wherein the dirt'swept is'projected in'the.

after described and particularly pointed outv in the appended claim.

In the accompanying drawings:

Figure 1 is a plan view of a sweeper constructed in accordance with the present invention.

Fig. 2 is an end elevation thereof.

Fig. 3 is a sectional view on the line 3-3 of F1g. 1.

Fig. 4 is a vertical sectional View taken through the central portion of the device on the line'4 4 of. Fig. 1.

Fig. 5 is a fragmentary plan view showing a modified form of roller drive wherein angular adjustment of the rollers is permitted.

Fig. 6 is a horizontal sectional view therethrough.

Fig. 7 is a detail fragmentary section, showing the mounting of the brush supporting arms.

Specification of Letters Patent.

Referring now more particularly to the accompanymg drawings, the frame of the device comprises a loop or castinglO having at the free ends of its legs a 'pair of bearing sleeves 11 in which is je'urnaled an axle 12 WlllCll extends aconsiderable distance outwardly of the bearing sleeves and has fixed thereon at its ends the driving thus formedground wheels 13.4 The truck is propel ed by graspin the crossbar grip 14 of a handle 15 to the inner end of which is secured the inwardly offset ends of bars 16 secured to the bearin sleeves 1l, the connection of the bars 16 and handle-15 being preferably pivotal .whereby to permit free movement of the handle. Secured to the bight portlon of the loop or casting 10 is a 'bar 17, the ends of which extend divergentlyoutwardly from the casting in-the form of a pair of arms 17 which carry bearing sleeves 18 at theirouter ends and which I are braced by bars 19 secured to their outer A: more detailed object resides in the pros vision of an arrangement for efiecting an' obllque. dlspositlon of the sweeplng elements ends and to the casting 10, it being observed that the axes of the bearing sleeves 18 are oppositely inclined with respect to the axis of the device.

Secured against the bar 17 at the center thereof is a U-shaped yoke 20, the arms of which extend forwardlyin the direction of movement of the deviceand carry bearings- 21 in which is. journaled: a counter shaft 22. .JOHillitlBd in the bearingsleeves 18 are the inner end portions of brush roller shafts 23, which are connected at their inner ends with the counter shaft 22 by universal couplings 24:, and said shafts 23 are thus held at two points to extend divergently forward in the direction of movement of the device. Mounted on the shaft 22 between the legs of the yoke 20 is a pulley 25 and mounted on the axle or drive shaft 12 between the bearing sleeves 11 is a pulley 26 of relatively larger diameter, the peripheries of these pulleys being provided with grooves V-shaped in cross section to snugly receive a belt 27 which has its stretches between the pulleys crossed.

Thus as the structure described is pro pelled over the ground, the forwardly inclined brush shafts 23 will be rotated in a direction opposite to rotation of the axle or drive shaft 12.

Disposedon the brush shafts 23 are the sleeve hubs 28 of brush rollers 29, and these sleeve hubs are held against relative movement on the shafts by abutment at their Patented July 5, 1921.

8, 1921. I Serial No. 435,988.

; inner ends with stop shoulder 30 on the shafts, and by abutment at their outer ends with retaining nuts 31f threaded on the shafts. To provide a clearance forthedriw ends of the brush rollers are concave, wherevby their peripheral end portions are retained inicontaet, and the outer ends of the brushes; are preferably also. dished to permit brushing against a wall or the like with- 1 out damage shaft;

j sweeper has thusvbeen prov1ded, attent10n An exceedingly simple and compact being particularly directed to. the groupingofthe entire drive mechanism at the center ofthe brush structure without interference with vacontinuous swee'plng actua-- 7 tion. from one end ofthe'brush structure i tothe other., 7 i In. Figs, B and structure is shown, which permitsangular adjustment of the brushes, to vary the sweep.- ing width of the device, and to. vary the amount of sweeping action exerted on a given surface in the travel of the device.

n this, structure, forwardly extending bracket arms H rare adjustably secured to the, sides of thecasting 10 by bolts 33 passed through slots 24 in' the-said casting and through the bracket arms and provided with.

clamping wing nuts 35; Pivoted to the outer ends of'the bracket arms are bearing collars i l8" receiving brush roller shafts 23, and the inner brush stops of these. shafts are pref- ;erably the form of nuts 30? threaded on thelinner ends of the shafts to adjust the positions of the inner ends of the brush in accordance with the angular adjustment thereto by the end of the roller 6, a sughu attained ing and supporting mechanisms of the tion, the bar 17 is omitted, the yoke 20 being shafts, and reta n an eflicient sweeping action atthe center of the device,- the' inner secured directly against the casting-"1 0 It will be also understood thatfurthermodifications and changes ofstructureimay be resorted to, to meetdifiering conditions of use withoutdeparting of the invention as claimed; Y 7 'What isjclaimed is:

slots, a 'main'shaft journaled jthrough the bearings and havingground wheels at its bearings and" carrying -a driven wheel-bee from' the spirit f r In a sweeper, the combination with a handle having a grip at its front end, bars pivoted-to-its rear end, a loop: having spaced 7 bearingsto whichsaid bars are connected, the sides of the loop having longitudinal (it) ends, anda driving wheel fast-on said shaft between such'beari-ngs, of a jyoke'carried' by the loop and havingbeari-ngsin its arms, acounter shaft journaled through-theseshaft and carrying roller brushes, bearing 7 collars for these shafts between said brushes and joints, arms pivoted to said collarsand leading'alongside said yoke; and "bolts through su'charms and adjrust'ablein said shafts with respect tol'the counter 'shaft Intestimony in the presence of two witnesses; g

Y e onnrnn. sir-ROM Witnesses: iri D.- J. CAMP/BELL, :Mr DRED-MANT N; 7

slots for'varying thepo'sitionof the brush whereof I afiix my signature, 

